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From: Wolfgang Schuster via ntg-context <ntg-context@ntg.nl>
Newsgroups: gmane.comp.tex.context
Subject: Re: Absolute positioning of \startcombination...
 \stopcombination
Date: Thu, 16 Mar 2023 18:27:53 +0100
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Cc: Wolfgang Schuster <wolfgang.schuster.lists@gmail.com>,
 Keith McKay <mckaymeister@gmail.com>
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Keith McKay via ntg-context schrieb am 16.03.2023 um 17:59:
>
> Hi,
>
> I would like to position a combination of images where the centre of 
> the combination coincides with the centre of the text area of a page. 
> In the example below I have made the combination into a layer thinking 
> that this would be the easiest way to position it where I wanted. 
> However to position in the centre of the page I would need to know the 
> size of the combination and use this to calculate the x and y values 
> for positioning of the layer. I have looked at the Wiki page on image 
> size of combinations but still cant figure out how to do it. Any 
> suggestions on how to go about this or is their a better way?
>
> Wiki Page reference: 
> https://wiki.contextgarden.net/Combinations#Image_Width
>
> Thanks
>
> Keith McKay
>
> %%% example %%%
>
> \setuppapersize[A4,portrait]%[A4,portrait]
>
> \setuplayout
>
> [backspace=2.5cm,
>
> topspace=1cm,
>
> height=28cm,
>
> width=17cm,
>
> header=0cm,
>
> footer=0.75cm,
>
> ]
>
> \useMPlibrary [dum]
>
> \starttext
>
> \definelayer[test3]
>
> \setlayer[test3][x=2cm,y=15cm]
>
> {\startcombination[nx=3,ny=1,distance=15mm,after=,location=middle]
>
> {\externalfigure[dummy]}{}
>
> \rotate[rotation=90]{\externalfigure[dummy]}{}
>
> {\externalfigure[dummy][]}{}
>
> \stopcombination}
>
> \flushlayer[test3]
>
> \stoptext
>

\useMPlibrary [dum]

\showframe [text] [text]

\setuplayout [tight]

\starttext

\centerbox
    {\bTABLE[frame=off,offset=7.5mm,align={middle,lohi}]
         \bTR
             \bTD
                 \externalfigure[dummy]
             \eTD
             \bTD
                 \rotate[rotation=90]{\externalfigure[dummy]}
             \eTD
             \bTD
                 \externalfigure[dummy]
             \eTD
         \eTR
     \eTABLE}

\stoptext

Wolfgang


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<html theme="default-light" iconset="color"><head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
</head><body text="#000000"><span>Keith McKay via ntg-context schrieb am
 16.03.2023 um 17:59:</span><br>
<blockquote type="cite" 
cite="mid:31725561-7e98-c964-0637-4883ad234351@gmail.com">
  <meta http-equiv="content-type" content="text/html; charset=utf-8">

  
  
    
  <p>Hi,</p>

    
  <p>I would like to position a combination of images where the centre of the combination coincides with the centre of the text area of a page. In the example below I have made the combination into a layer thinking that this would be the easiest way to position it where I wanted. However to position in the centre of the page I would need to know the size of the combination and use this to calculate the x and y values for positioning of the layer. I have looked at the Wiki page on image size of combinations but still cant figure out how to do it. Any suggestions on how to go about this or is their a better way?</p>

    
  <p>Wiki Page reference:   <a class="moz-txt-link-freetext" href="https://wiki.contextgarden.net/Combinations#Image_Width" moz-do-not-send="true">https://wiki.contextgarden.net/Combinations#Image_Width</a></p>

    
  <p>Thanks</p>

    
  <p>Keith McKay
</p>

    
  <p style=" margin-top:0px; margin-bottom:0px; margin-left:0px; margin-right:0px; -qt-block-indent:0; text-indent:0px;">%%% example %%%</p>

    
  <p style=" margin-top:0px; margin-bottom:0px; margin-left:0px; margin-right:0px; -qt-block-indent:0; text-indent:0px;">\setuppapersize[A4,portrait]%[A4,portrait]</p>

    
  <p style=" margin-top:0px; margin-bottom:0px; margin-left:0px; margin-right:0px; -qt-block-indent:0; text-indent:0px;">\setuplayout</p>

    
  <p style=" margin-top:0px; margin-bottom:0px; margin-left:0px; margin-right:0px; -qt-block-indent:0; text-indent:0px;">  [backspace=2.5cm,</p>

    
  <p style=" margin-top:0px; margin-bottom:0px; margin-left:0px; margin-right:0px; -qt-block-indent:0; text-indent:0px;">  topspace=1cm,</p>

    
  <p style=" margin-top:0px; margin-bottom:0px; margin-left:0px; margin-right:0px; -qt-block-indent:0; text-indent:0px;">  height=28cm,</p>

    
  <p style=" margin-top:0px; margin-bottom:0px; margin-left:0px; margin-right:0px; -qt-block-indent:0; text-indent:0px;">  width=17cm,</p>

    
  <p style=" margin-top:0px; margin-bottom:0px; margin-left:0px; margin-right:0px; -qt-block-indent:0; text-indent:0px;">  header=0cm,</p>

    
  <p style=" margin-top:0px; margin-bottom:0px; margin-left:0px; margin-right:0px; -qt-block-indent:0; text-indent:0px;">  footer=0.75cm,</p>

    
  <p style=" margin-top:0px; margin-bottom:0px; margin-left:0px; margin-right:0px; -qt-block-indent:0; text-indent:0px;">  ]</p>

    
  <p style=" margin-top:0px; margin-bottom:0px; margin-left:0px; margin-right:0px; -qt-block-indent:0; text-indent:0px;">\useMPlibrary [dum]</p>

    
  <p style=" margin-top:0px; margin-bottom:0px; margin-left:0px; margin-right:0px; -qt-block-indent:0; text-indent:0px;">\starttext</p>

    
  <p style=" margin-top:0px; margin-bottom:0px; margin-left:0px; margin-right:0px; -qt-block-indent:0; text-indent:0px;">\definelayer[test3]</p>

    
  <p style=" margin-top:0px; margin-bottom:0px; margin-left:0px; margin-right:0px; -qt-block-indent:0; text-indent:0px;">\setlayer[test3][x=2cm,y=15cm]</p>

    
  <p style=" margin-top:0px; margin-bottom:0px; margin-left:0px; margin-right:0px; -qt-block-indent:0; text-indent:0px;">   {\startcombination[nx=3,ny=1,distance=15mm,after=,location=middle]</p>

    
  <p style=" margin-top:0px; margin-bottom:0px; margin-left:0px; margin-right:0px; -qt-block-indent:0; text-indent:0px;">          {\externalfigure[dummy]}{}       </p>

    
  <p style=" margin-top:0px; margin-bottom:0px; margin-left:0px; margin-right:0px; -qt-block-indent:0; text-indent:0px;">          \rotate[rotation=90]{\externalfigure[dummy]}{}      </p>

    
  <p style=" margin-top:0px; margin-bottom:0px; margin-left:0px; margin-right:0px; -qt-block-indent:0; text-indent:0px;">          {\externalfigure[dummy][]}{}</p>

    
  <p style=" margin-top:0px; margin-bottom:0px; margin-left:0px; margin-right:0px; -qt-block-indent:0; text-indent:0px;">   \stopcombination}</p>

    
  <p style=" margin-top:0px; margin-bottom:0px; margin-left:0px; margin-right:0px; -qt-block-indent:0; text-indent:0px;">\flushlayer[test3]</p>

    
  <p style=" margin-top:0px; margin-bottom:0px; margin-left:0px; margin-right:0px; -qt-block-indent:0; text-indent:0px;">\stoptext</p>

    
  <p><style type="text/css">p, li { white-space: pre-wrap; }</style></p>
</blockquote>
<br>
\useMPlibrary [dum]<br>
<br>
\showframe [text] [text]<br>
<br>
\setuplayout [tight]<br>
<br>
\starttext<br>
<br>
\centerbox<br>
   {\bTABLE[frame=off,offset=7.5mm,align={middle,lohi}]<br>
        \bTR<br>
            \bTD<br>
                \externalfigure[dummy]<br>
            \eTD<br>
            \bTD<br>
                \rotate[rotation=90]{\externalfigure[dummy]}<br>
            \eTD<br>
            \bTD<br>
                \externalfigure[dummy]<br>
            \eTD<br>
        \eTR<br>
    \eTABLE}<br>
<br>
\stoptext<br>
<br>
Wolfgang<br>
<br>
</body></html>

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